[topologie]

As a Mathematician who worked in Theoretical Physics for a bit, I'm happy to hear that there's people out there interested in the area.

Maths often get a bad rep, but at their core they are probably the most interesting thing to learn, on par with music in my opinion.

I encourage anyone interested in Mathematics (regardless of your level) to check out Roger Penrose's The Road to Reality. I know it's technically a physics book, even though Penrose was originally a Mathematician, but trust me, he explains things in a way that open up your mind, even for seasoned veterans. He begins with basic calculus, but ends up covering Groups, Topology, Complex Analysis, Differential Geometry, etc etc etc.

And, on parallel, check out John Baez's guide on how to learn Maths and Physics: https://math.ucr.edu/home/baez/books.html

I love all of Baez's pages and work, he does some really interesting mathematics: https://math.ucr.edu/home/baez/

I'm also a big fan of Tai-Danae Bradley's work: https://www.math3ma.com/

Anyway, I hope people find these recommendations interesting or useful...